Hose coupling



July 14, 1936. w. A. SMITH, SR 2,047,714

HOSE COUPLING Fil ed Dec. 29, 19:54

' INVENTOR'. I/WM 'amATJmz'flmS H15 A TTORNEY.

Patented July 1 4, 1936 nose ooormse William A. Smith, Sn, Athens, Pa.,assignor to Ingersoll-Rand Company, corporation of New Jersey JerseyGity, N. J., a

Application December 29, 1934, ser al No. 759,658

ll Claim. (01. 285-82) This invention relates to couplings. and more"particularly to a hose coupling adapted to connect hose or'conduitsections in end to end relationship with respect to each other.

One object of the invention is to enable the hose sections to be quicklyconnected together or detached from each other. I

Another object is to employ the hose ass sealing means for preventingleakage of pressure fluid from the coupling. I

Other objects will be in part obvious and in part pointed outhereinafter.

' In the accompanying drawing and in which similar reference numeralsrefer to similar parts,

Figure 1 is a longitudinal side view of a hose coupling constructed inaccordance with the practice of the invention,

Figure 2 is a longitudinal view, in section, of the hose coupling, and

Figure 3 is a view similar to Figure 2 showing a modified form of theinvention;

Referring more particularly to the drawing, and atflrst to the form ofthe inventlon illustrated in Figures 1 and 2, 20 designates a hosecoupling comprising a pairof sleeves 2i and 22 which are arranged in endto end and non-contacting relationship with respect to each other and toprovides; space H between their adjacent ends. One of the sleeves, asfor instance that designated 2i, is threadedinternally for connection toa pipe 23. Extending through the sleeve 22 and into a recess 24 in thesleeve 2i is a flexible hose 25 to convey pressure fluid from the pipe23 to a machine intended to be actuated. "The hose is of the samediameter as the recess 24 and its outer surface is in constant contactwith the wall of the recessw The bore 26 inthe sleeve 22 is preferablyof the same diameter as the recess 24 and near its innermost end is anannular groove 21 into which is pressed a portion ofthe hose 25 by-aferrule 28 disposed within the hdse. The ferrule illustrated is in theform of a. sleeve havingan annular rib 29 on its periphery. The ribisoflarser diameter than the interior of the hose so that" upon insertionof the ferrule 28 into the hose the a portion of the hose surroundingthe rib 29 is bulged outwardly into the groove 21. I Y 1 Preferably, thehose is extended only part way into the recess 24 to permit a. spacebetween the and 1? To the end that the sleeves may be expeditiouslyconnected together or detached from each other they are arranged in acasing 32 which is both slidable and rotatable upon the sleeves. Thecasing 32 prevents relative transverse movement of the sleeves and isprovided at one end with bayonet slots 83, to receive lugs or pins 38carried by the sleeve 2i.

0n the opposite end of the casing 32 is an introverted flange orshoulder 35 adapted to abut a shoulder 36 on the sleeve 22 to retainsaid sleeve within the casing 32. The flange 35, moreover, serves as aseat for an end of a spring 31 within the casing and which spring seatswith its opposite end against a shoulder 88 on the periphery of thesleeve 22.

A spring ring 39 is arranged-in a peripheral groove Ml in the sleeve 22to limit endwise movement of the casing 32 with respect to the sleeve22.

In assembling the device, the hose section 25 is disposed within thesleeve 22. The end of the hose section is extended beyond the inner endof thesleeve 22 a sufflcient distance to allow it to extend into therecess 24 without, however, seating upon the bottom of said recess, inthe assembled position of the sleeves. The ferrule 28 is then insertedinto the hose to a pcsitionwherein the annular rib 29 lies in the planeof the groove 21. Thus, the surrounding portion of the hose is bulgedoutwardly into the groove 21 and the hose 2! is thereby retained withinthe sleeve 22.

The casing 32 may then be moved to a position to effect engagementbetween the slots 33 and the pins 34 and the connection-between theseeleinents will be maintained by the spring 31 which acts to press theouter surfaces of the bayonet slots against the pins. M. If then thehose is opened to pressure fluid supply the pressure fluid actingagainst the portion of the inner surface of 3| of the hose will expandthe hose and maintain its outer surface firmly seated against the sidewall of the recess 24 to assure a seal between these elements.

The pressure fluid will also act" against the surfaces and 8| and exerta force thereon tending to separate the sleeves 2| and 22 and therebymaintain the shoulders 36 and 35 and the slot 33 and pins flrmly inengagement with each other.

In practice the present invention has been found to be a highlyeflicient device for connecting pressure fluid conduits together. Thesleeve portions of the coupling maybe quickly connected or dethe hoselying between the ferrule 28 and the end tache'd from .each other and,when assembled, will be held firmly in that position by the force of thepressure fluid acting againstthe sleeve II and the end of the hose 2!. Afurther highly desirable feature of the present invention is that byutilizing the end of the hose as a means for preventing leakage'from thecoupling the need of separate gaskets or packing devices has beenentirely eliminated. 10 In the modified form of the inventionillustrated in Figure 3 only one sleeve, designated ll, is required. Thesleeve ll is threaded internally at one end for connecting it to thepipe 23, and the hose'ZS is inserted in the other end of the an internalshoulder 42. The sleeve II also has an internal annular groove 43 toreceive an annular ridge ll of the hose 25 caused by the rib 29 onv theferrule 28.

In assembling the hose 2! within the sleeve II the hose is firstinserted into the sleeve until the end of the hose seats against theshoulder 42. Upon insertion of the ferrule 28 in the hose the sleeve Imay be connected to the pipe 23 and the conduits communicated with asource of pressure fluid supply. As in the modification of the inventionprevisleeve and preferably seated with its end against ously describedthe end of the hose also extends beyond the corresponding end of theferrule so that the pressure fluid may act against the interior surfaceof the hose to press the outer stir;- face into fiuid tight relationshipwith the inner surface of the-sleeve ll.

I claim: A hose coupling comprising -a pair of sleeves arranged end toend in non-contacting relation with respect to each other, one of saidsleeves 10 having an internal annular groove, a hose in the sleeves andhaving a portion of its inner surface subjected to pressure fluid toexpand the hose into sealing relationship with the adjacent sleeve,

. a ferrule in the hose to press a portion thereof 15 .into the groove,a casing encircling the sleeves and being slidable thereon, interlockingportions on the casing and one of the sleeves for detachably securingthe casing to the sleeves, shoulders on the casing and the other sleeve,a spring ingo terp'osedbetween the shoulders, and opposed pressure areason one of the sleeves and the hose subjected to pressure fluid tendingto separate the sleeves and thereby maintain the interlocking portionsfirmly in engagement with each other. is

A.'SMITH, Ba.

